The war of rebellion undertaken by General Morden, attempting to impose a new order on the world, is now a chapter for the history books, and the status quo and tranquility have been restored around the globe.

The resurrected Morden attempted to enact his new plans for a coup but his plans were foiled thanks to the lightning-fast surprise attack of the Government Forces who got wind of the plot in advance…

Marco and Tarma of the Peregrine Falcons, who distinguished themselves in the trouncing of Morden's insurgent forces, have once again had their requests for discharge denied and continue to participate in missions leading the Falcons.
Although General Morden himself has been designated as missing, remnants of his army still lie in wait in various regions throughout the world, and Marco and Tarma's abilities and experience will be required to destroy their strongholds.
In the midst of a fierce battle with these remnants, Marco and Tarma could not help but feel Morden's influence and a third try for world domination.

The fiend still lives.

And he has not given up.

Meanwhile, the Special Ops Squad S.P.A.R.R.O.W.S. in the Intelligence Agency of the Government Forces has been investigating a rash of mysterious events parallel to their pursuit of General Morden.
From the trivial snatching of livestock to unrelated incidents like the disappearance of important world figures and the abnormal enlargement of living creatures, all taken together point to one possibility.

This is another menace behind all this that can't be General Morden.

In light of this the Intelligence Agency proposes another joint mission with S.P.A.R.R.O.W.S. and the Falcons in a high-handed manner.
Their request asking for members of S.P.A.R.R.O.W.S. to participate in the land assault on the desert island on which remnants of Morden's army are hiding is approved.
This is because the Intelligence Agency insists the results of their analysis shows there must be some common link between the remnants of Morden's army and the mysterious incidents, but naturally the top brass of the Government Forces laugh this off.
All things being normal, any connection between the large creatures that have mutated abnormally and Morden's forces would have been laughed off by the upper echelons.
But considering the previous achievements of the Intelligence Agency's operations so far, the request is tacitly approved…

The squad leader Marco, fearing upheaval in the chain of command, naturally voices his fierce opposition, but, as always, he is respectfully blown off and the landing operations are launched.

Marco shrugs in disbelief.

Tarma waves it all off.

Eri turns her back to it all in resignation.

Fio smiles nostalgically to greet her old pals (?).

The prelude to a new battle that no one saw coming begins to play quietly, but it is difficult to make out its faint melody.

But soon, however, it is sure to conclude in a crescendo of unprecedented intensity.